Bretwalda
noun
Bret·wal·da
ˈbretˌwȯldə
plural -s
: the chief king in Anglo-Saxon England —used as a title in the Old English Chronicle for several kings said to have held supremacy over kingdoms beyond their own
Word History
Etymology
Old English bretwalda, brytenwealda, probably from Bryten Britain + -walda, -wealda (from wealdan to rule)